Late last year we ran a story on the mysterious Antikythera mechanism - and Hublot's attempt to recreate it in wristwatch form. The article went on to be one of the highest rating Gizmag stories of all time due to its thoroughly remarkable subject and the fascinating adventure story that brought this piece of ancient genius into the modern world. The wristwatch version looked pretty snappy, too - and if you wanted to get your hands on one, here's your chance! Only four have been built, with three headed to various European museums, but the fourth is up for auction. We doubt it will go cheap.